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20 -12 | =
∆A= 34. 8 |= 3(-12)-(-33)(8)
-33. -12 |=
∆B=16. 34 |=16(-33)-20(34)
20. -33|=
Investiga sobre el metodo determinantes, para resolver ecuaciones de 2x2.
ya te deje la estructura solo te queda resolverlo.